Contents

module Panda
  module CMS
    class Menu < ApplicationRecord
      self.table_name = "panda_cms_menus"

      after_save :generate_auto_menu_items, if: -> { kind == "auto" }

      has_many :menu_items, -> { order(lft: :asc) }, foreign_key: :panda_cms_menu_id, class_name: "Panda::CMS::MenuItem", inverse_of: :menu
      belongs_to :start_page, class_name: "Panda::CMS::Page", foreign_key: "start_page_id", inverse_of: :page_menu, optional: true

      accepts_nested_attributes_for :menu_items, reject_if: :all_blank, allow_destroy: true

      validates :name, presence: true, uniqueness: {case_sensitive: false}
      validates :kind, presence: true, inclusion: {in: ["static", "auto"]}
      validate :validate_start_page

      def generate_auto_menu_items
        return false if kind != "auto"

        # NB: Transactions are not distributed across database connections
        transaction do
          menu_items.destroy_all
          menu_item_root = menu_items.create(text: start_page.title, panda_cms_page_id: start_page.id)
          generate_menu_items(parent_menu_item: menu_item_root, parent_page: start_page)
        end
      end

      private

      def generate_menu_items(parent_menu_item:, parent_page:)
        parent_page.children.where(status: [:active]).each do |page|
          menu_item = menu_items.create(text: page.title, panda_cms_page_id: page.id, parent: parent_menu_item)
          if page.children
            generate_menu_items(parent_menu_item: menu_item, parent_page: page)
          end
        end
      end

      #
      # Validate that the start page is set if the menu is of kind auto
      #
      # @return nil
      # @visibility private
      #
      def validate_start_page
        if kind == "auto" && start_page.nil?
          errors.add(:start_page, "can't be blank")
        end
      end
    end
  end
end

Version data entries

3 entries across 3 versions & 1 rubygems

Version	Path
panda-cms-0.7.3	app/models/panda/cms/menu.rb
panda-cms-0.7.2	app/models/panda/cms/menu.rb
panda-cms-0.7.0	app/models/panda/cms/menu.rb